There are 2 components required to generate the auto NAV.
1. FMGS R1A
2. Latest version of EIS step 8 (think it's 8.3 but could be wrong)
Very old aircraft may also have issues with DMC/DU etc etc, so I am not sure whether the R1A mod is available for all MSN's without further pre update mods.
Last edited by Rashid Bacon; 23rd Nov 2012 at 21:24.